Role-play Abomasnow?That sounds sweet: imagine a flash fire poke-chandelure could be more easily countered(then again, most flash fire pokemon have no tell-abilities,so it wouldn't be a solid counter to any one of them).
Intimidate would be good to role play.
Or storm drain.
Or plus/minus(God,imagine the blizzards after that).
All of a sudden Abomasnow appears much more useable
I've just looked at the team Sid(sorry it took three months :/ ) and notice that you lack a spread move: when protection and multiple attacks per party member are so common,loads of single-target attacks are inefficient(considering a spread move could take out more than the intended target).
Earthquake's a big one,because steel types are otherwise going to cause problems to your team.
Fire/water/grass is a nice balanced set to start with-more often than not,the legendaries rarely synergise well with each other due to the weaknesses they share(note the big ice weakness-reliable fire attack is recommended).
It does cover most of triple battle's common issues,but as you've already stated,it might not be able to retaliate as effectively even without these problems out of the way.
You know... I very rarely pack many multi-hit moves. It's weird, but I just don't. I mean... it depends on the team I run, obviously, but my utility belt teams don't run very many of them now. The team I'm running now has... one. I think just one.